38results about How to "Curb roll" patented technology

The invention provides a device capable of adjusting vertical loads of four wheels of an automobile. The device comprises a front left wing plate, a front right wing plate, a rear left wing plate, a rear right wing plate, a wing plate posture adjusting mechanism and an automobile-mounted ECU. The front left wing plate and the front right wing plate are arranged on the front portion of an automobile body and located in front of front wheels on the lower end face of a chassis, the front left wing plate is adjacent to the left front wheel, and the front right wing plate is adjacent to the right front wheel. The rear left wing plate and the rear right wing plate are arranged on the left side and the right side of the rear portion of the automobile body. The wing plate posture adjusting mechanism is connected with the front left wing plate and the front right wing plate so as to adjust the attack angles of the front left wing plate and the front right wing plate. The automobile-mounted ECUis connected with the wing plate posture adjusting mechanism. The wing plate posture adjusting mechanism is connected with the rear left wing plate and the rear right wing plate so as to adjust the attack angles and the position height of the rear left wing plate and the rear right wing plate. When the automobile travels, the front left wing plate, the front right wing plate, the rear left wing plate and the rear right wing plate convert airflow force born by the wing plates into pressure and / or resistance applied to the automobile body; and aerodynamic force can be used for applying pressureor resistance to the automobile in the automobile traveling process so as to enhance the controllability of the automobile.

The invention discloses an automobile steering assisting aerodynamics external member which comprises two tail wing structures, two lifting passages and a hydraulic pipeline, wherein the tail wing structures are positioned in the lifting passages, and comprise main wings, auxiliary wings and driving mechanisms; the main wings and the auxiliary wings are arranged parallelly; the main wings are positioned below the auxiliary wings; the front ends of the auxiliary wings are close to the tail ends of the main wings; end plates are respectively arranged on the same side ends of the main wings and the auxiliary wings; the main wings are fixedly connected with the end plates; the auxiliary wings are rotationally connected with the end plates; the driving mechanisms comprise main wing cylinders, auxiliary wing cylinders and bases; rotating assisting cylinders are arranged on the bases; the hydraulic pipeline comprises a hydraulic pump, a main wing pipeline used for connecting or disconnecting the main wing cylinders synchronously, an auxiliary wing pipeline and a rotating assisting pipeline used for independently connecting or disconnecting each rotating assisting cylinder; strip-shaped through holes are formed in the front sides of the end plates and positioned above the auxiliary wings. The invention aims to provide the automobile steering assisting aerodynamics external member, which can adjust lower pressure and air resistance on the left side and the right side of the automobile tail to improve the adhesion property of an automobile and reduce tire load.

The invention discloses an automobile tail part double-turbulence device, which comprises two tail wing structures, an air flow channel and a hydraulic pipeline, wherein the tail wing structure is located at the tail end of the air flow channel and comprises a main wing, an aileron and a driving mechanism, the main wing is located below the aileron and provided with a plurality of upward extending aileron positioning plates, the upper ends of the aileron positioning plates are hinged with the tail end of the aileron, the front end of the aileron is close to the tail end of the main wing, the middle part of the main wing is provided with a rotating plate which is vertically arranged and can rotate relative to the main wing, the other end of the rotating plate is hinged with the aileron, the driving mechanism comprises an aileron cylinder and a base, the base is provided with rotating auxiliary cylinders, and the hydraulic pipeline comprises a hydraulic pump, an aileron pipeline and rotating auxiliary pipelines used for independently switching each rotating auxiliary cylinder. The invention aims to provide a device which can regulate down pressure and air resistance at the left side and the right side of an automobile tail part so as to improve the automobile adhesion performance and reduce the tire load.

The invention discloses a hydraulic semi-active suspension for a special vehicle and a control system thereof. The hydraulic semi-active suspension is composed of a hydraulic motor, a generator, a storage battery, a DC module, four sets of energy feedback adjusting valve units and four sets of shock absorber hydraulic cylinders, and the automatic adjusting system is composed of a driving motor, ahydraulic pump, a hydraulic source oil tank, an oil filter, a low-pressure energy accumulator, a high-pressure energy accumulator, four sets of automatic adjusting valve units and four sets of shock absorber hydraulic cylinders. Eachh energy feedback adjusting valve unit consists of a switch valve and a one-way valve, and each automatic adjusting valve unit consists of a three-position four-way electromagnetic valve and an oil tank; the control method comprises an energy feedback control method and an active adjustment control method. The height of each suspension shock absorber can be adjusted according to different working conditions when emergency braking, rapid acceleration and steering are about to roll over, so that the vehicle smoothness, the operation stability and the driver safety are improved, and energy recovery is carried out when the vehicle runs linearly and stably.

The invention discloses an anti-side-inclination device. The anti-side-inclination device is arranged at the bottom of a vehicle, the structure of the device mainly comprises a middle rotating shaft driven by a motor to rotate and a plurality of balancing weights revolving around the middle rotating shaft, the revolving rails of the balancing weights do not coincide with one another, and namely, in the revolving process of the balancing weights, collision and friction between the balancing weights will not happen. When a vehicle on which the device is installed is in the balance state or described to be in a normal driving state, the gravity centers of the balancing weights are located on the central axis of the rotating shaft, and namely, the balancing weights are in the force balance state. When side inclination happens, the rotating shaft drives the gravity centers of the balancing weights to rotate to the direction opposite to side inclination, and side inclination is prevented; when the side inclination state ends, the middle rotating shaft drives the gravity centers of the balancing weights to return to the central axis again, and the balancing weights return to the force balance state again.

The invention discloses a multiple-piece tail wing structure which comprises two tail wing devices, airflow channels and a hydraulic pipeline. The tail wing devices are arranged at the tail ends of the airflow channels respectively. Each tail wing device comprises a main wing, an auxiliary wing and a driving mechanism. The main wing is arranged under the auxiliary wing; the middle portion of the main wing is provided with a plurality of auxiliary wing positioning plates extending upwards; the upper ends of the auxiliary wing positioning plates are hinged with the tail end of the auxiliary wing; the front end of the auxiliary wing is close to the tail end of the main wing; the middle portion of the main wing is provided with a rotation plate which is vertically arranged and can rotate with respect to the main wing; and the other end of the rotation plate is hinged with the middle portion of the auxiliary wing. The driving mechanism comprises a main wing cylinder, an auxiliary wing cylinder, a rotation assisting cylinder and a base. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline, an auxiliary wing pipeline and a rotation assisting pipeline. The invention is to provide the multiple-piece tail wing structure which is capable of adjusting air resistance and downward pressure applied to the left and right two sides of the tail portion of an automobile so as to improve automobile adhesion performance and reduce tyre load.

The present invention discloses a hydraulic interconnection suspension pipeline connection mode switching device and a control method. A sensor unit comprises a vehicle speed sensor and four range finders, and the vehicle speed sensor and the four range finders are responsible for inputting the real-time vehicle speed and the real-time length of four suspensions of a vehicle into an electronic control unit (ECU) respectively; the ECU of a processing unit is used for calculating the real-time data of the vehicle by combining the data stored in an memory unit; and an electromagnetic directional valve A and an electromagnetic directional valve B of an execution unit are used for controlling a hydraulic oil pipeline to be connected and disconnected, and thus switching among different connection modes of the hydraulic interconnection suspensions is realized. By applying the method, the running state of the vehicle can be judged, appropriate hydraulic interconnection suspension pipeline connection modes are thus selected, the vehicle body posture is controlled, and the riding comfort of the vehicle is improved.

The invention discloses a shearing mode magnetorheological damper comprising an inner barrel, an outer barrel and a telescopic barrel located between the inner barrel and the outer barrel. The telescopic barrel and the inner barrel as well as the outer barrel are sealed by seal rings so as to form a closed cavity. The cavity is filled with magnetorheological fluid. A telescopic rod moving along with the telescopic barrel is arranged in the telescopic barrel. A coil base is fixed to the tail end of the telescopic rod. An annular coil groove is formed in the outer wall of the coil base. A coil is wound in the coil groove. A magnetic field is produced after the coil is electrified. Working clearances are reserved between the telescopic barrel and the inner barrel as well as the outer barrel.The magnetic field acts on the magnetorheological fluid in the working clearances. A small hole is formed in the bottom of the outer barrel. A compensating barrel is installed outside the small hole.The shearing mode magnetorheological damper has significant low-frequency large-damping characteristics, when a vehicle turns, quite large antiroll damping force can be provided, thus rolling of a vehicle body is effectively restrained, and curve trafficability and driving safety of the vehicle are improved.

The invention discloses a device for adjusting the down force of an automobile. The device comprises two spoiler structures, a lifting channel and a hydraulic pipeline. Each spoiler structure is located in the lifting channel and comprises a main wing, an auxiliary wing and a driving mechanism capable of driving the main wing to rise and fall and driving the auxiliary wing to rotate, wherein the main wing is located below the auxiliary wing, the front end of the auxiliary wing is close to the tail end of the main wing, end plates are arranged at the ends, on the same side, of the main wing and the auxiliary wing, the main wing is fixedly connected with the corresponding end plate, and the auxiliary wing is connected with the corresponding end plate in a rotary mode; the driving mechanism comprises a main wing cylinder, an auxiliary wing cylinder and a base, and a rotation assisting cylinder used for driving the main wing and the auxiliary wing to rotate relative to the base at the same time is arranged on the base. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline, an auxiliary wing pipeline and a rotation assisting pipeline. By the adoption of the device, the down force and air resistance on the left side and right side of the tail of the automobile can be adjusted so as to improve the adhesion property of the automobile and reduce tire loads.

The invention relates to a vehicle semi-active suspension integrated control method and a control system. The method comprises the following steps: obtaining control damping to control a suspension: if a vehicle is about to roll laterally, enhancing the damping according to lateral acceleration, and then controlling the suspension; if the vehicle is about to pitch, enhancing the damping according to the longitudinal acceleration, and then controlling the suspension; and if the vehicle is about to roll and pitch, enhancing and superposing the damping according to the lateral acceleration and the longitudinal acceleration to serve as control damping to control the suspension. According to the method, roll and pitch principles are combined, the suspension damping is actively adjusted according to a vehicle body posture (pitch and roll) in the vehicle driving process, intervention is performed in advance, roll and pitch of the vehicle body are effectively restrained on the basis that vehicle riding comfort and driving safety are both considered, and the stability of the vehicle driving posture is improved.

The invention provides a multiple operating condition damping self-adaption hydro-pneumatic spring and a control method thereof. The multiple operating condition damping self-adaption hydro-pneumatic spring mainly comprises a cylinder barrel, a pull rod, a pull rod piston, a rod barrel, a cylinder barrel piston and a rod barrel piston. The pull rod is fixed in the cylinder barrel, the upper end of the pull rod is fixed on the top of the cylinder barrel, and the pull rod piston is fixed to the lower end of the pull rod; the pull rod piston is arranged in the rod barrel to form a first piston structure, the cylinder barrel piston is connected to the upper end of the rod barrel, and an upper end opening of the rod barrel is sealed by the lower end face of the cylinder barrel piston; and a second piston structure is formed by the cylinder barrel piston and the cylinder barrel, the rod barrel piston is further arranged on the outer wall of the rod barrel, and a third piston structure is formed by the rod barrel, the rod barrel piston and the cylinder barrel. According to the multiple operating condition damping self-adaption hydro-pneumatic spring and the control method thereof, the demand that the natural frequency of a car body is basically changeless under the condition that a car is in different loading operating conditions is met, and heeling and pitching vibration of the car body owing to the typical limiting conditions of the car such as emergency braking and corner turning at a high speed can be effectively restrained and attenuated on the basis that car riding comfort is met, so that the demand of car riding stability is met.

The invention discloses an adjustable turbulent flow system which comprises two spoiler structures, airflow channels and a hydraulic pipeline. The spoiler structures are located at the tail ends of the airflow channels and comprises main wings, auxiliary wings and drive mechanisms, the main wings are located below the auxiliary wings, the front ends of the auxiliary wings are close to the tail ends of the main wings, end boards are arranged at the same side ends of the main wings and the auxiliary wings, the main wings and the end boards are fixedly connected, the auxiliary wings and the end boards are rotationally connected, rotary boards arranged parallel to the end boards are arranged at the middle portions of the main wings, the other ends of the rotary boards are hinged to the auxiliary wings, the drive mechanisms comprises auxiliary wing cylinders and bases, and rotary auxiliary cylinders are arranged on the bases. The hydraulic pipeline comprises a hydraulic pump, an auxiliary pipeline and a rotary auxiliary pipeline. Multiple strip-shaped through holes formed in parallel are formed in the positions above the auxiliary wings, of the front sides of the end boards. By the adoption of the adjustable turbulent flow system, the pressing force and the air resistance of the left side and the right side of the tail portion of an automobile can be adjusted, so that the attaching performance of the automobile is improved, and the tire load is reduced.

The invention discloses a deformable tailfin system which comprises two tailfin structures, airflow channels and hydraulic pipelines. The tailfin structures are arranged at the tail ends of the airflow channels, and each tailfin structure comprises a main fin, an auxiliary fin and a drive mechanism, wherein the main fin is located below the main fin, the front end of the auxiliary fin is close to the tail end of the main fin, the ends of the same sides of the main fin and the auxiliary fin are both provided with an end plate, the main fin is fixedly connected with the corresponding end plate, and the auxiliary fin is rotatably connected with the corresponding end plate. Each drive mechanism comprises an auxiliary fin cylinder and a base, wherein a rotation auxiliary cylinder is arranged on the base. Each hydraulic pipeline comprises a hydraulic pump, an auxiliary fin pipeline and a rotation auxiliary pipeline, wherein the auxiliary fin pipeline is used for connecting or disconnecting the two auxiliary fin cylinders at the same time, and the rotation auxiliary pipeline is used for switching on or switching off each rotation auxiliary cylinder independently. Multiple parallel strip-shaped through holes are formed in the front side of each end plate and located above the corresponding auxiliary fin. The deformable tailfin system can adjust the down force and air pressure on the left side and the right side of the tail portion of an automobile, so that the adhesion property of the automobile is improved, and the tire load is lowered.

The invention provides an actuator of a vehicle and an apparatus for controlling posture of a vehicle with the said actuator. The actuator includes a gap reducing mechanism for axially pre-pressing gears inside, and a position sensor assembled close to a motor inside. The actuator of a vehicle also includes a fixed stabilizer bar fixed to one side of a housing; a rotary stabilizer bar assembled to the other side of the housing in a rotary manner; a central gear, a planetary gear, a support, and a multi-stage planetary gear unit; a stator which generates magnetic forces when being powered on, a rotor rotating through the magnetic forces, and the motor assembled inside the housing; and the gap reducing mechanism for axially pre-pressing the central gear at one side of the multi-stage planetary gear unit. Through adoption of the actuator, the vehicle is prevented from tilting leftwards or rightwards to the maximum, so active side tilting prevention effects are achieved. Passengers feel much safer, and inconvenience brought to passengers, caused by tilting and cornering of the vehicle, is eliminated, and a vehicle driving effect is improved.

The invention discloses an automobile rear diffuser structure which comprises two rear wing structures, an airflow channel and a hydraulic pipeline. The empennage structures are located at the tail end of the airflow channel. Each rear wing structure comprises a main wing, an auxiliary wing and a driving mechanism, wherein the main wing is located below the auxiliary wing, the front end of the auxiliary wing is close to the tail end of the main wing, and the same side ends of the main wing and the auxiliary wing are each provided with an end plate; each main wing is fixedly connected with the corresponding end plate, and each auxiliary wing is rotationally connected with the corresponding end plate; and the middle of each main wing is provided with a rotating plate parallel to the corresponding end plate, and the other end of each rotating plate is hinged to the corresponding auxiliary wing. Each driving mechanism comprises an auxiliary wing cylinder and a base. A rotating auxiliary cylinder is arranged on each base. The hydraulic pipeline comprises a hydraulic pump, an auxiliary wing pipeline and a rotating auxiliary pipeline. A plurality of parallel strip-shaped through holes are arranged at the positions, on the front side of each end plate, of the corresponding auxiliary wing. According to the automobile rear diffuser structure, a deformation rear wing system which can adjust downward pressure and air resistance on the left and right sides of the tail of an automobile so as to improve the attachment performance of the automobile and reduce tire loads is provided.

The invention discloses an automobile downward pressure adjusting device which comprises two tail wing devices, an airflow channel and a hydraulic pipeline. The tail wing devices are located at the tail end of the airflow channel. Each tail wing device comprises a main wing, an auxiliary wing and a driving mechanism, wherein the main wing is located below the auxiliary wing, a plurality of upward-extending auxiliary wing positioning plates are arranged in the middle of the main wing, the upper ends of the auxiliary wing positioning plates are hinged to the tail end of the auxiliary wing, and the front end of the auxiliary wing is close to the tail end of the main wing; and a vertically-arranged rotating plate capable of rotating relative to each main wing is arranged in the middle of each main wing, and the other end of each rotating plate is hinged to the middle of the corresponding auxiliary wing. The driving mechanism comprises a main wing cylinder, an auxiliary wing cylinder, a rotating auxiliary cylinder and a base. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline, an auxiliary wing pipeline and a rotating auxiliary pipeline. According to the automobile downward pressure adjusting device, air resistance and downward pressure on the left and right sides of the tail of an automobile can be adjusted, so that the adhesion property of the automobile is improved, and tire loads are lowered.

The invention discloses a sporting automobile tail wing which comprises two spoiler structures, two lifting channels and a hydraulic pipeline. The spoiler structures are located in the lifting channel and comprise main wings arranged in parallel, auxiliary wings and driving mechanisms. The main wings are located below the auxiliary wings, the front ends of the auxiliary wings are close to the tail ends of the main wings, end plates are arranged on the same side ends of the main wings and the auxiliary wings, the main wings are provided with rotating plates and are fixedly connected with the end plates, and the auxiliary wings are rotationally connected with the end plates. The driving mechanisms comprise main wing cylinders, auxiliary wing cylinders and bases. The bases are provided with rotation assisting cylinders. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline connecting and disconnecting the two main wing cylinders at the same time, an auxiliary wing pipeline and a rotation assisting pipeline used for independently connecting and disconnecting each rotation assisting cylinder, and bar-shaped through holes are formed in the positions, above the auxiliary wings, on the front sides of the end plates. The sporting automobile tail wing can adjust the lower pressure and the air resistance on the left side and the right side of the tail of an automobile so as to improve the adhesion performance of the automobile and reduce the load of tires.

The invention discloses an air flow assistance adjusting device, which comprises two empennage structures, air flow channels and a hydraulic pipeline, wherein the empennage structures are located at the tail ends of the air flow channels. Each empennage structure comprises a main wing, an aileron and a driving mechanism, wherein the main wing is located below the aileron, the front end of the aileron is close to the tail end of the main wing, the middle part of the upper board surface of the main wing is provided with a positioning plate which is fixed relative to the main wing, the upper end of the positioning plate is rotatably connected with the aileron, the driving mechanism comprises an aileron cylinder, a rotating auxiliary cylinder and a base used for positioning the rotating auxiliary cylinder, and a body of the aileron cylinder is rotatably connected with the positioning plate. The hydraulic pipeline comprises a hydraulic pump, an aileron pipeline used for switching the two aileron cylinders and a rotating auxiliary pipeline used for independently switching each rotating auxiliary cylinder. The invention aims to provide a device which can adjust a down force and air resistance at the left side and the right side of a tail part of an automobile, thereby improving the adhesion performance of the automobile, and reducing the tire load.

The invention discloses a double-rod shearing mode magnetorheological damper. The magnetorheological damper comprises an inner cylinder, an outer cylinder and a telescopic cylinder positioned betweenthe inner cylinder and the outer cylinder; gaps are respectively reserved between the telescopic cylinder and the inner cylinder and between the telescopic cylinder and the outer cylinder; sealing rings are respectively arranged in the gaps at an interval; the gaps between the telescopic cylinder and the inner cylinder and between the telescopic cylinder and the outer cylinder are sealed through the sealing rings to further form a closed working chamber; the working chamber is filled with magnetorheological fluid; the telescopic cylinder can reciprocate in the magnetorheological fluid along the working chamber; a coil is wound on the outer wall of the section, located in the working chamber, of the inner cylinder; a magnetic field is generated after the coil is electrified; and the magnetic field acts on the magnetorheological fluid in the working chamber. According to the double-rod shearing mode magnetorheological damper, damping force is generated through a shearing mode, so that the magnetorheological damper has the obvious low-speed large damping characteristic. When a vehicle turns, quite large anti-turning damping force can be provided, so that tipping of the vehicle body iseffectively inhibited, operation stability of the vehicle is improved, the passing speed at curves is improved, and smoothness is improved.

The invention relates to the technical field of transport means, in particular to a trailer. The trailer includes a frame, an axle and an oil-pressure pipeline, the frame includes two longitudinal beams and a cross beam fixed between the two longitudinal beams, the axle is installed at the bottom of the frame, the oil-pressure pipeline is arranged on the side surface of the cross beam and the inner side surfaces of the longitudinal beams, a hydraulic actuating device and an energy accumulator are arranged on the oil-pressure pipeline, one end of the hydraulic actuating device is connected to the longitudinal beams, the other end of the hydraulic actuating device is connected to the end part of the axle to lift the side part of the frame, thus the trailer is kept steady, side tilting of thetrailer is effectively restrained, thus rollover is prevented, and transportation safety is ensured.

The invention provides an electromagnetic sucker special for hoisting mechanical equipment. The electromagnetic sucker special for the hoisting mechanical equipment comprises an electromagnetic suckerbody. The electromagnetic sucker body is fixed to the bottom end of a hoisting plate. A hoisting chain is fixedly connected to the top end of the hoisting plate. A hoisting ring is fixedly connectedto the top end of the hoisting chain. A wear-resisting alloy layer is arranged on the surface of the hoisting ring in a surface welding manner. A falling prevention frame used for preventing the electromagnetic sucker body from side falling is arranged on the connecting portion of the hoisting chain and the hoisting ring. The electromagnetic sucker is durable in use, by means of the falling prevention frame, side falling probably occurring to the electromagnetic sucker body is restrained, and the stability when the electromagnetic sucker body is used for hoisting and conveying goods is improved effectively.

The invention provides a shock absorber damper assembly and a vehicle, and belongs to the technical field of vehicles. The shock absorber damper assembly comprises two shock absorber dampers and a support structural member fixedly arranged between the two shock absorber dampers, wherein the support structural member can effectively prevent the top structures of the shock absorber dampers from becoming deformed caused by weight transfer of the vehicle, and comprises a rod member and a regulating member connected with the rod member, the regulating member is used for regulating the length of thesupport structural member, and the length of the support structural member is adjusted, so that the support effect between the two shock absorber dampers can be effectively increased, the shock absorber damper assembly can be suitable for vehicles of different models, and the applicability of the shock absorber damper assembly can be improved.

The invention discloses an automobile tail turbulence protection structure. The automobile tail turbulence protection structure comprises two tail wing structures, two lifting channels and a hydraulic pipeline. The tail wing structures are located in the lifting channels. Each tail wing structure comprises a main wing, an auxiliary wing parallel with the main wing and a driving mechanism, wherein the main wing is located below the auxiliary wing, the front end of the auxiliary wing is close to the tail end of the main wing, end plates are arranged at the same-side ends of the main wing and the auxiliary wing respectively, a rotating plate is arranged on the main wing, the main wing is fixedly connected with the end plates, the auxiliary wing is connected with the end plates in a rotating mode, and the driving mechanism comprises a main wing cylinder, an auxiliary wing cylinder and a base provided with a rotating auxiliary cylinder. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline used for opening or closing the two main wing cylinders at the same time, an auxiliary wing pipeline and a rotating auxiliary pipeline used for opening or closing the rotating auxiliary cylinders independently. Strip-shaped through holes are formed in the positions, above the auxiliary wings, of the front sides of the end plates. The automobile tail turbulence protection structure can adjust the downward pressure and air resistance of the left and right sides of the tail of an automobile, so that the road holding of the automobile is improved, and loads on tires are reduced.

The invention provides a column holding type step-up robot. The robot comprises a chassis frame. The upper end of the chassis frame is connected with a lifting frame in an up-down moving mode. The lifting frame is connected with a column holding and rotating mechanism. The column holding and rotating mechanism can hold a stand column located on one side of a step and can drive the chassis frame torotate around the stand column. The lower end of the chassis frame is provided with at least one positioning universal ball. The at least one positioning universal ball is located below the column holding and rotating mechanism. When the at least one positioning universal ball abut against the outer surface of the lower end of the stand column, the column holding and rotating mechanism can hold the outer surface of the upper end of the stand column. The column holding and rotating mechanism at the upper end of the chassis frame is matched with the positioning universal ball at the lower end of the chassis frame to improve the fit precision of the column holding type step-up robot and the stand column. Side tipping of the column holding type step-up robot in the lifting process is effectively prevented so that the column holding type step-up robot can achieve the more stable effect when stepping up.

The invention discloses a device for adjusting air resistance at the tail of an automobile. The device comprises two tail wing structures, airflow channels and a hydraulic pipeline, wherein the tail wing structures are arranged at the tail ends of the airflow channels respectively. Each tail wing structure comprises a main wing, an auxiliary wing and a driving mechanism, wherein the main wing is arranged under the auxiliary wing; the front end of the auxiliary wing is close to the tail end of the main wing; the middle portion of the upper plate surface of the main wing is provided with a positioning plate which is fixed with respect to the main wing; and the upper end of the positioning plate is rotatably connected with the auxiliary wing. Each driving mechanism comprises a main wing cylinder, an auxiliary wing cylinder, a rotation assisting cylinder and a base, wherein an auxiliary wing cylinder body is rotatably connected with the positioning plate. The hydraulic pipeline comprises a hydraulic pump, a main wing pipeline for connecting and disconnecting the two main wing cylinders simultaneously, an auxiliary wing pipeline for connecting and disconnecting the two auxiliary wing cylinders simultaneously, and a rotation assisting pipeline for independently connecting and disconnecting each rotation assisting cylinder. The invention is to provide the automobile tail air resistance adjusting device capable of adjusting the air resistance and downward pressure at the left and right two sides of the tail portion of the automobile, thereby improving automobile adhesion performance and reducing tyre load.